I've never crashed a wedding. When I was a kid I of course used to crash parties. Crashing a wedding is difficult though because you have to have the suit and you have to have information in case someone catches you. You have to know at least some names and something.
I learned why 'out riding alone' is an oxymoron: An equestrian is never alone is always sensing the other being the mysterious but also understandable living being that is the horse.